:root{--primary:#2F6BFF;--secondary:#6FA3FF;--bg:#F4F7FB;--card-bg:#FFFFFF;--text-main:#1F2D3D;--border:#D6E2FF;--glow:#A5C4FF;--btn-grad:linear-gradient(180deg,#4A8BFF 0%,#2F6BFF 100%);--header-offset:122px}*,*::before,*::after{box-sizing:border-box}body{margin:0;padding-top:var(--header-offset);font-family:'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;color:var(--text-main);background:var(--bg)}.site-header{position:fixed;top:0;left:0;right:0;width:100%;z-index:1000;background:var(--card-bg);box-shadow:0 4px 20px rgba(47,107,255,0.15);border-bottom:1px solid var(--border)}.header-top{height:68px;min-height:68px;display:flex;align-items:center;overflow:hidden;background:linear-gradient(180deg,#FFFFFF 0%,#F4F7FB 100%);width:100%;border-bottom:1px solid var(--border)}.header-container{width:100%;height:100%;max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;padding:0 32px}.logo{display:inline-block;font-size:26px;font-weight:800;letter-spacing:0.5px;color:var(--primary);text-decoration:none;text-transform:lowercase;line-height:1;transition:color 0.2s ease}.logo:hover{color:#1a4fd6}.logo img{display:block;max-height:60px;height:auto;width:auto;max-width:280px;object-fit:contain}.desktop-nav-buttons{display:flex;gap:12px;align-items:center}.mobile-nav-buttons{display:none;min-height:48px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 24px;font-size:14px;font-weight:700;line-height:1.2;border-radius:8px;text-decoration:none;border:none;cursor:pointer;transition:transform 0.2s ease,box-shadow 0.2s ease;white-space:nowrap}.btn-login{background:var(--card-bg);color:var(--primary);border:2px solid var(--primary)}.btn-login:hover{background:#EEF3FF;transform:translateY(-1px);box-shadow:0 4px 12px rgba(47,107,255,0.25)}.btn-register{background:var(--btn-grad);color:#FFFFFF;box-shadow:0 4px 14px rgba(47,107,255,0.35)}.btn-register:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(47,107,255,0.5)}.main-nav{height:52px;min-height:52px;display:flex;align-items:center;overflow:hidden;background:#1F3A8A;width:100%}.nav-container{height:100%;max-width:1200px;margin:0 auto;display:flex;flex-direction:row;justify-content:center;align-items:center;padding:0 20px;position:relative}.nav-menu{display:flex;flex-direction:row;justify-content:center;align-items:center;gap:2px;list-style:none;margin:0;padding:0}.nav-menu li{margin:0;padding:0}.nav-menu a{display:block;padding:8px 12px;font-size:14px;font-weight:600;color:#FFFFFF;text-decoration:none;border-radius:6px;transition:background 0.2s ease,color 0.2s ease;white-space:nowrap}.nav-menu a:hover{background:var(--primary);color:#FFFFFF}.hamburger-menu{display:none;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:44px;height:44px;padding:0;background:transparent;border:none;cursor:pointer;z-index:1001}.hamburger-menu span{display:block;width:26px;height:3px;background:#FFFFFF;border-radius:2px;transition:transform 0.3s ease,opacity 0.3s ease}.hamburger-menu.active span:nth-child(1){transform:translateY(8px) rotate(45deg)}.hamburger-menu.active span:nth-child(2){opacity:0}.hamburger-menu.active span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}.nav-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.5);z-index:999;opacity:0;transition:opacity 0.3s ease}.nav-overlay.active{display:block;opacity:1}.site-footer{background:#0F1F4B;color:#C9D6F0;padding:0;margin-top:60px;font-size:14px;line-height:1.6}.footer-container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}.footer-top{padding:48px 0 32px;border-bottom:1px solid rgba(111,163,255,0.2)}.footer-top-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}.footer-col{min-width:0}.footer-about{padding-right:8px}.footer-logo{display:inline-block;font-size:24px;font-weight:800;color:#FFFFFF;text-decoration:none;letter-spacing:0.5px;margin-bottom:14px;text-transform:lowercase}.footer-logo:hover{color:var(--glow)}.footer-description{color:#AFC1E3;margin:0 0 12px;word-wrap:break-word;overflow-wrap:break-word}.footer-title{font-size:16px;font-weight:700;color:#FFFFFF;margin:0 0 16px;padding-bottom:10px;position:relative}.footer-title::after{content:'';position:absolute;left:0;bottom:0;width:36px;height:3px;background:var(--btn-grad);border-radius:2px}.footer-nav{list-style:none;margin:0;padding:0}.footer-nav li{margin:0 0 10px}.footer-nav a{color:#AFC1E3;text-decoration:none;transition:color 0.2s ease,padding-left 0.2s ease;display:inline-block;word-wrap:break-word;overflow-wrap:break-word}.footer-nav a:hover{color:#FFFFFF;padding-left:4px}.footer-mid{padding:26px 0;border-bottom:1px solid rgba(111,163,255,0.2)}.footer-mid-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.footer-bottom{padding:18px 0 22px;text-align:center}.copyright{margin:0;color:#8FA4CC;font-size:13px}.footer-slot-anchor-inner{display:block;min-height:1px}.site-header a{text-decoration:none}@media (max-width:768px){:root{--header-offset:110px}.header-top{height:60px !important;min-height:60px !important}.header-container{width:100%;max-width:none;padding:0 15px;position:relative;height:100%}.logo{position:absolute !important;left:50% !important;transform:translateX(-50%) !important;display:flex !important;align-items:center !important;justify-content:center !important;max-width:calc(100% - 120px);font-size:22px !important}.logo img{display:block !important;max-width:100%;height:auto;max-height:56px !important}.hamburger-menu{display:flex;position:relative;z-index:2;order:-1}.desktop-nav-buttons{display:none !important}.mobile-nav-buttons{display:flex !important;align-items:center;justify-content:center;min-height:48px;width:100%;max-width:100%;box-sizing:border-box;padding:6px 15px;overflow:hidden;gap:10px;flex-wrap:nowrap;background:#F4F7FB;border-bottom:1px solid var(--border)}.mobile-nav-buttons .btn{flex:1;min-width:0;max-width:calc(50% - 5px);box-sizing:border-box;padding:8px 12px;font-size:13px;white-space:normal;word-wrap:break-word;overflow-wrap:break-word}.main-nav{height:48px !important;min-height:48px !important;display:block;position:fixed;top:calc(60px + 48px + 48px);left:0;bottom:0;width:100%;max-width:100%;overflow-y:auto;overflow-x:hidden;background:#1F3A8A;display:none;transform:translateX(-100%);transition:transform 0.3s ease;z-index:1000}.main-nav.active{display:block;transform:translateX(0)}.nav-container{width:100%;max-width:none;padding:16px 15px;flex-direction:column;justify-content:flex-start;align-items:stretch;height:auto}.nav-menu{flex-direction:column;justify-content:flex-start;align-items:stretch;width:100%;gap:4px}.nav-menu a{padding:12px 16px;font-size:15px;text-align:left}.hamburger-menu.active span:nth-child(1){transform:translateY(8px) rotate(45deg)}.footer-container{padding:0 18px}.footer-top-grid{grid-template-columns:1fr 1fr;gap:22px}.footer-mid-grid{grid-template-columns:1fr 1fr;gap:12px}.footer-top{padding:34px 0 26px}.page-content{overflow-x:hidden;max-width:100%}.page-content img{max-width:100% !important;height:auto !important;display:block}body{overflow-x:hidden}}@media (max-width:480px){.footer-top-grid{grid-template-columns:1fr}.footer-mid-grid{grid-template-columns:1fr}}
/* 移动端内容区防溢出（系统追加，请勿删除） */
@media (max-width: 768px) {
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
  body {
    overflow-x: hidden;
  }
}
/* 内容保护（系统追加，请勿删除） */
body {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
input, textarea, select, [contenteditable="true"] {
  -webkit-user-select: text;
  -moz-user-select: text;
  user-select: text;
}